ABAP Select data from SAP table CEWMWOLQ into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CEWMWOLQ table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to CEWMWOLQ. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the CEWMWOLQ table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_CEWMWOLQ TYPE STANDARD TABLE OF CEWMWOLQ,
      WA_CEWMWOLQ TYPE CEWMWOLQ,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <CEWMWOLQ> TYPE CEWMWOLQ.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CEWMWOLQ.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CEWMWOLQ
  INTO TABLE IT_CEWMWOLQ.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CEWMWOLQ
*  INTO TABLE @DATA(IT_CEWMWOLQ2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_CEWMWOLQ INDEX 1 INTO DATA(WA_CEWMWOLQ2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CEWMWOLQ ASSIGNING <CEWMWOLQ>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CEWMWOLQ>-MANDT = 1.
<CEWMWOLQ>-WAREHOUSE = 1.
<CEWMWOLQ>-WAREHOUSEORDER = 1.
<CEWMWOLQ>-WAREHOUSEORDERCREATIONRULE = 1.
<CEWMWOLQ>-WAREHOUSEORDERSTATUS = 1.

ENDLOOP.

LOOP AT IT_CEWMWOLQ INTO WA_CEWMWOLQ.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CEWMWOLQ-WAREHOUSEORDERSTATUSNAME, sy-vline,
  WA_CEWMWOLQ-WHSEORDEROVERDUEHOURS, sy-vline,
  WA_CEWMWOLQ-WHSEORDERLASTCHGUTCDATETIME, sy-vline,
  WA_CEWMWOLQ-LASTCHANGEDBYUSER, sy-vline,
  WA_CEWMWOLQ-WAREHOUSEORDERHASWHSETASK, sy-vline,
  WA_CEWMWOLQ-WAREHOUSEORDERHASPHYSINVTRYDOC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CEWMWOLQ you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_CEWMWOLQ TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_CEWMWOLQ INTO WA_CEWMWOLQ.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field WAREHOUSEORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CEWMWOLQ-WAREHOUSEORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CEWMWOLQ-WAREHOUSEORDER.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CEWMWOLQ_STR, 
MANDT TYPE STRING,
WAREHOUSE TYPE STRING,
WAREHOUSEORDER TYPE STRING,
WAREHOUSEORDERCREATIONRULE TYPE STRING,
WAREHOUSEORDERSTATUS TYPE STRING,
WAREHOUSEORDERSTATUSNAME TYPE STRING,
WHSEORDEROVERDUEHOURS TYPE STRING,
WHSEORDERLASTCHGUTCDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
WAREHOUSEORDERHASWHSETASK TYPE STRING,
WAREHOUSEORDERHASPHYSINVTRYDOC TYPE STRING,
WHSEORDERCRTNWHSETMZNDATETIME TYPE STRING,
WHSEORDERCRTNWHSETMZNYEAR TYPE STRING,
WHSEORDERCRTNWHSETMZNMONTH TYPE STRING,
WHSEORDERCRTNWHSETMZNDATE TYPE STRING,
WHSEORDERCRTNWHSETMZNHOUR TYPE STRING,
WHSEORDERCRTNWHSETMZNTIME TYPE STRING,
WHSEORDLTSTSTRTWHSETMZNDTETME TYPE STRING,
WHSEORDLTSTSTRTWHSETMZNYEAR TYPE STRING,
WHSEORDLTSTSTRTWHSETMZNMONTH TYPE STRING,
WHSEORDLTSTSTRTWHSETMZNDATE TYPE STRING,
WHSEORDLTSTSTRTWHSETMZNHOUR TYPE STRING,
WHSEORDLTSTSTRTWHSETMZNTIME TYPE STRING,
WHSEORDERCONFWHSETMZNDATETIME TYPE STRING,
WHSEORDERCONFWHSETMZNYEAR TYPE STRING,
WHSEORDERCONFWHSETMZNMONTH TYPE STRING,
WHSEORDERCONFWHSETMZNDATE TYPE STRING,
WHSEORDERCONFWHSETMZNHOUR TYPE STRING,
WHSEORDERCONFWHSETMZNTIME TYPE STRING,
WRHSORDSTRTUTCDATETIME TYPE STRING,
WHSEORDERCONFUTCDATETIME TYPE STRING,
WAREHOUSEORDERCONFIRMEDBY TYPE STRING,
ACTIVITYAREA TYPE STRING,
ACTIVITYAREANAME TYPE STRING,
WRHSORDCRTNUTCDATETIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
NUMBEROFWAREHOUSEORDERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CEWMWOLQ_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_CEWMWOLQ_STR-MANDT sy-vline 
WA_CEWMWOLQ_STR-WAREHOUSE sy-vline 
WA_CEWMWOLQ_STR-WAREHOUSEORDER sy-vline 
WA_CEWMWOLQ_STR-WAREHOUSEORDERCREATIONRULE sy-vline 
WA_CEWMWOLQ_STR-WAREHOUSEORDERSTATUS sy-vline 
WA_CEWMWOLQ_STR-WAREHOUSEORDERSTATUSNAME sy-vline 
WA_CEWMWOLQ_STR-WHSEORDEROVERDUEHOURS sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERLASTCHGUTCDATETIME sy-vline 
WA_CEWMWOLQ_STR-LASTCHANGEDBYUSER sy-vline 
WA_CEWMWOLQ_STR-WAREHOUSEORDERHASWHSETASK sy-vline 
WA_CEWMWOLQ_STR-WAREHOUSEORDERHASPHYSINVTRYDOC sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERCRTNWHSETMZNDATETIME sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERCRTNWHSETMZNYEAR sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERCRTNWHSETMZNMONTH sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERCRTNWHSETMZNDATE sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERCRTNWHSETMZNHOUR sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERCRTNWHSETMZNTIME sy-vline 
WA_CEWMWOLQ_STR-WHSEORDLTSTSTRTWHSETMZNDTETME sy-vline 
WA_CEWMWOLQ_STR-WHSEORDLTSTSTRTWHSETMZNYEAR sy-vline 
WA_CEWMWOLQ_STR-WHSEORDLTSTSTRTWHSETMZNMONTH sy-vline 
WA_CEWMWOLQ_STR-WHSEORDLTSTSTRTWHSETMZNDATE sy-vline 
WA_CEWMWOLQ_STR-WHSEORDLTSTSTRTWHSETMZNHOUR sy-vline 
WA_CEWMWOLQ_STR-WHSEORDLTSTSTRTWHSETMZNTIME sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERCONFWHSETMZNDATETIME sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERCONFWHSETMZNYEAR sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERCONFWHSETMZNMONTH sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERCONFWHSETMZNDATE sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERCONFWHSETMZNHOUR sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERCONFWHSETMZNTIME sy-vline 
WA_CEWMWOLQ_STR-WRHSORDSTRTUTCDATETIME sy-vline 
WA_CEWMWOLQ_STR-WHSEORDERCONFUTCDATETIME sy-vline 
WA_CEWMWOLQ_STR-WAREHOUSEORDERCONFIRMEDBY sy-vline 
WA_CEWMWOLQ_STR-ACTIVITYAREA sy-vline 
WA_CEWMWOLQ_STR-ACTIVITYAREANAME sy-vline 
WA_CEWMWOLQ_STR-WRHSORDCRTNUTCDATETIME sy-vline 
WA_CEWMWOLQ_STR-CREATEDBYUSER sy-vline 
WA_CEWMWOLQ_STR-NUMBEROFWAREHOUSEORDERS sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.